package ioperations;

import book.Book;
import book.BookList;

import java.util.Scanner;

public class DelOperation implements IOperation{
    public void work(BookList bookList){
    System.out.println("删除图书...");
        Scanner scanner=new Scanner(System.in);
        System.out.println("请输入你想删除的书名:");
        String name=scanner.nextLine();
        int currentSize=bookList.getUsedSize();
        int pos=-1;
        int i=0;
        for (;i  <currentSize ; i++) {
            Book book = bookList.getBook(i);
            if (book.getName().equals(name)) {
                pos = i;
                break;
            }
        }
            if(i==currentSize){
                System.out.println("没有找到你想要删除的书!");
                return;
            }
            //从这里开始删除
            for (int j = pos; j <currentSize-1 ; j++) {
                //booklist[j]=booklist[j+1]
                Book book=bookList.getBook(j+1);
                bookList.setBook(j,book);
            }
            bookList.setBook(currentSize-1,null);
            bookList.setUsedSize(currentSize-1);
        System.out.println("删除成功!!!");
        }
    }




































